Juniper MS-MPC-128G Multiservice MPC for MX240 / MX480 / MX960

The Juniper MS-MPC-128G is a 128GB Multiservice Modular Port Concentrator for the Juniper MX240, MX480, and MX960 Universal Routing Platforms — providing inline services processing including NAT, stateful firewall, IPsec, flow monitoring, and application-aware services directly on the MPC, offloading these functions from the Routing Engine for high-performance, scalable service delivery.

Key Features

• 128GB memory Multiservice MPC for inline NAT, firewall, IPsec, and flow services on MX240/480/960
• Offloads service processing from the Routing Engine for high-scale concurrent sessions
• Supports NAT (NAPT44, NAT64), stateful firewall, ALGs, and flow-based monitoring
• Accepts MS-MIC (Multiservice MIC) cards for additional interface and service capacity
• Hot-plug capable for non-disruptive services MPC maintenance in active MX chassis

Product Specifications

• Part Number: MS-MPC-128G
• Manufacturer: Juniper Networks
• Component Type: Multiservice MPC
• Compatible Systems: Juniper MX240, MX480, MX960
• Memory: 128GB
• MIC Slots: 2 (accepts MS-MIC modules)
• Hot-Plug: Yes

Component Specifications

• Services: NAT44, NAT64, stateful firewall, IPsec, CGNAT, ALGs
• Flow Monitoring: Inline Jflow/NetFlow v9 and IPFIX sampling
• Session Scale: Millions of concurrent NAT/firewall sessions (128GB enables high session table)
• Redundancy: Supported via chassis redundant SCB and dual RE
• Management: Junos OS service configuration and monitoring

Use Cases

• Carrier-grade NAT (CGNAT) for service providers requiring large-scale subscriber address translation
• Stateful firewall and ALG enforcement at MX-series core and edge scale
• IPsec encryption for secure WAN or inter-DC traffic on MX240/MX480/MX960
• Inline Jflow/IPFIX traffic visibility for service provider billing and network analytics

Compatibility

• Juniper MX240, MX480, and MX960 Universal Routing Platforms
• Not compatible with MX104, MX150, or MX10003 (platform-specific service card form factors)
• Accepts MS-MIC modules for additional multiservice interface capacity
• Verify Junos OS version for MS-MPC-128G feature and scale support before installation

Frequently Asked Questions

What is the difference between MS-MPC and a standard MPC?

Standard MPCs handle Layer 2/3 packet forwarding only. The MS-MPC-128G adds dedicated service processing hardware and memory for stateful services like NAT, firewall, and IPsec — enabling these functions at line rate without consuming Routing Engine resources or impacting forwarding MPC performance.

How does 128GB memory on the MS-MPC improve NAT/firewall scale?

NAT and stateful firewall session tables are stored in the MS-MPC's memory. 128GB enables significantly larger concurrent session tables compared to lower-memory MS-MPC variants — critical for CGNAT deployments with millions of subscriber NAT sessions or high-connection-rate firewall policies.

Can the MS-MPC-128G handle IPsec tunnels at line rate?

The MS-MPC-128G supports IPsec encryption and decryption for MX-series WAN and DC interconnect applications. Maximum IPsec throughput depends on the installed MS-MIC modules and Junos configuration — consult Juniper's MS-MPC performance datasheet for specific IPsec throughput figures.

The Juniper MS-MPC-128G delivers high-scale multiservice processing on MX240, MX480, and MX960 — combining 128GB of session memory with inline NAT, stateful firewall, IPsec, and Jflow capabilities to support CGNAT, security, and traffic visibility services at service provider scale without impacting forwarding plane performance.